The docuseries follows Steven Avery, a man who had been cleared of a sexual assault charge after spending 18 years in prison.

Free and with a $36 million lawsuit pending against Wisconsin's Manitowoc County, Avery suddenly found himself at the center of the investigation into the 2005 murder of photographer Teresa Halbach.

Even worse, his teen nephew, Brendan Dassey, was accused of helping.

In the end, both Avery and Dassey were given life sentences for Halbach's murder.

Since "Murderer" was released in December 2015, many people have come away with their own takes and theories on the case. And there have been a couple major developments.

Kathleen Zellner, a defense attorney whose work has so far led to the overturning of wrongful convictions for 17 people, took on Avery's case earlier this year. She has expressed nothing but confidence that she can get Avery freed.

And Dassey's conviction was recently overturned. A federal judge in Milwaukee ruled that Dassey's constitutional rights were violated when authorities questioned him without an adult present.

All this amounts to several loose ends that need to be tied up.

Here are six questions that need to be answered on "Making a Murderer" season two:

How will Brendan Dassey's overturned conviction play out for Steven Avery?

The recent overturning of Dassey's murder conviction has revived the attention to Avery's conviction. But how will it play out for Avery? Will Dassey become a trial witness for his uncle? Or will Avery's attorney want to distance his case from Dassey's?

Also, there's still a chance that the state will refile charges against Dassey. Does that mean season two will once again feature Dassey's trial?

Who is new defense attorney Kathleen Zellner's alternate suspect?

Bobby Dassey, Steven Avery's nephew and Brendan Dassey's brother.AP

During the trial and in the wake of the success of "Making a Murderer," several possible alternate suspects in the Halbach murder have been discussed in the media and fan forums. They've included Avery family members, Halbach's ex-boyfriend, and even a serial killer known for pinning his murders on others.

In March, Zellner said she was close to identifying alternate suspects among key people who knew the victim. Currently, Zellner says that she has a very good lead on an alternate suspect. Will that pan out?

Will new tests uncover that evidence was planted?

The vial of Steven Avery's blood, one of the questionable pieces of evidence in the case.Netflix

Since choosing to represent Avery, Zellner has been using new tests on the alleged crime scene and the evidence in the case. She hasn't established whether earlier tests have come up with anything that would help Avery's case, and recently told The New York Times that she's embarking on more, with results coming back within 60 days.

Nonetheless, she still feels fairly certain her defense team will come up with something.

"It may not all be successful, but I believe if even one bit of evidence is planted, the conviction is going to be vacated," she told The Times.

Will any of the tests prove that evidence was planted, as many "Making a Murderer" fans suspect, or is she bluffing?

What story does Teresa Halbach's cellphone really tell?

She discovered in Halbach's phone records that the victim had made two calls a couple of days before she was killed to a man with a record of sexual abuse crimes in Arizona.

Zellner found something else in the records that she thought was her biggest proof of Avery's innocence. Judging by the location of her last call, based on cell tower data, Halbach had left the Avery auto yard, but Avery's phone records show that he didn't leave the property, according to the lawyer.

Zellner faults Avery's previous legal team, Jerry Buting and Dean Strang, for not using this information during his trial.

Will Avery's former defense team play a role in season two?

"Making a Murderer" also made stars of Avery's defense attorneys in his original trial for the Halbach murder, Dean Strang and Jerry Buting. They have both stayed active in discussing the case after the series premiered and have teased their return to help Avery.

Zellner, though, seems like a lone wolf. She has also been openly critical of Strang's and Buting's defense of Avery.

It remains to be seen if they can play a role in Avery's case going forward.

Has the show's popularity helped or hurt Avery's case?

Steven Avery on a production monitor during his trial.Netflix

From the outside looking in, the popularity of "Making a Murderer" must have surely helped Avery's case, right?

But the story may be different from the inside looking out. Has the popularity of the series actually hindered the case and further investigations? Have the many new theories about evidence and other suspects actually pulled resources away from more solid leads?

Will we find that the dedicated amateur sleuths actually found things that Zellner, Avery's previous attorneys, and investigators overlooked? And will those findings come to Avery's aid, or incriminate him?

Of course, these are all the things that make us look forward to season two of "Making a Murderer."